package cn.wolfcode.service.impl;


import cn.wolfcode.domain.Department;
import cn.wolfcode.mapper.DepartmentMapper;
import cn.wolfcode.qo.PageResult;
import cn.wolfcode.qo.QueryObject;
import cn.wolfcode.service.IDepartmentService;
import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.Collections;
import java.util.List;

@Service
@Transactional
public class DepartmentServiceImpl implements IDepartmentService {

    @Autowired
    private DepartmentMapper departmentMapper;

    @Override
    public void delete(Long id) {
        departmentMapper.deleteByPrimaryKey(id);
    }

    @Override
    public void insert(Department department) {
        departmentMapper.insert(department);
    }

    @Override
    public Department selectOne(Long id) {
        Department department = departmentMapper.selectByPrimaryKey(id);
        return department;
    }

    @Override
    public List<Department> selectAll() {
        List<Department> departments = departmentMapper.selectAll();
        return departments;
    }

    @Override
    public void update(Department department) {
        departmentMapper.updateByPrimaryKey(department);
    }

    @Override
    public PageInfo<Department> query(QueryObject qo) {
        // 表明接下来的查询用分页
        PageHelper.startPage(qo.getCurrentPage(), qo.getPageSize());
        List<Department> departments = departmentMapper.selectForList(qo);
        return new PageInfo<>(departments);

        // 未使用分页插件
        /*int count = departmentMapper.selectForCount(qo);
        if (count == 0){
            return new PageResult<>(qo.getCurrentPage(), qo.getPageSize(), 0, Collections.emptyList());
        }
        return new PageResult<>(qo.getCurrentPage(), qo.getPageSize(), count, departmentMapper.selectForList(qo));
*/
    }
}
